Tractor.



A. 0. ESPE.

ATRACTORl APPLICATION FILED MAY I4, I9I2.

1,199,254. Patentedsept. 26,1916.

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TRACTOR.

1,199,254 APPLICATl-ON FILED MAY 14, 1912. Y 'Patentedsepitlve sSHEETS-SHEET 2.

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TRACTOR.

APPLICATION FILED MAY I4, 1912.

Patented Sept. 26, 1916.

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A` 0. ESPE.

TRACTOR.

APPLICATION FILED MAY I4. 1912.

farne .uuNuzrflHllllLufN PatentedSept. 26, 1916.

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TRACTOR.

APPLICATION FILED MAY I4, T912.

6 HEETS-SHEET 5.

Patented Sept. 26

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A. 0. ESPE.

TRACTOR.

APPLICATION FILED MAY I4. 1912.

Patented-Sept. 26, 1916.

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Unirnn sfrarns PATENT curio. A

ALBERT O. ESPE, Ol CROOKSTON, MINNESOTA., ASSIGNOR TO AVERY COMPANY, OFPEORIA, ILLINOIS, .A CORPORATION F ILLINOIS.

TRACTOR.

Y Specication of Letters Patent.

Application led. May 14, 1912. Serial No. 697,234.

To all whom @'15 may concern:

Be it known that I, ALBERT O. Esrii, a citizen of the United States,residing at Crookston, in the county of Polk and State of Minnesota7have invented certain new and useful Improvements in Tractors, of whichthe following is a specification, reference being had therein to theaccompanying drawing.

My invention relates more especially to tractors or traction enginesadapted to be driven by internal combustion motors.

The object of my invention is to provide a. powerful but at thesame timeunusually light tractor adapted for varied uses'on and about a farm.

tractor embodying my improvements is well adapted for the hauling ofvehicles, for the hauling of implements such as plows or harvesters, andfor the driving of various machines, such asI threshers, which requirepower. v Among the principal novel structural features of myA inventionare a power plant mounted to slide bodily'as a whole with respect to themain supporting frame, and a single clutch through which power can betransmitted either to drive the tractor bodily or to supply power toanother vmachine through a belt.

Numerous other novel features and com# binations of features are setforth in the following specification vand claims. y

Of the accompanying drawings which show the embodiment of my inventionwhich I now deem preferable, Figure 1 isa side elevation of the tractor,the near ground wheels being omitted for the sake of clearness; 2 a planView; Fig. 3 is arfragmentary combined plan and sectional view of thoclutch, pinion and belt wheel at one end of the engine or moto-r shafttogether with the parts immediately associated therewith; Fig. il'. is aside elevation of the parts shown in Fig. 3; Fig. 5 is a detail crosssectional view through the side members of the traction carriage and thepower plantframe, the section through the power plant frame being takenalong the'` line 5 5 of Fig. 4; Fig. 6 is a' fragmentary side view,partly diagrammatic, showing the motor pinion in the position which itassumes when the power plant is in its rear position; Fig. 7 is a viewsimilar to Fig. 6, showingthe motor pinion in the position which itassumes a fragmentary, plan andV sectional view taken along the line13-13 of Fig. 14; Fig.

1l-` is a longitudinal sectional view taken along the line M ll of Fig.13.

Referring to the drawings it will be noted that l have provided twoseparate and` distinct frames. These frames and the parts associatedwith them will be `hereinafter fully described but for the present itcan be bornein mind that there 'is a main traction carriage supportedupon the usual four ground wheels and a second or power plant frameVwhich supports all of the elements of the power plant and which isslidable bodily with respect to the frame of theY carriage for a purposeto be set forth.

The main frame of the traction carriage is preferably rectangular inconfiguration and comprises two side elements 1, 1, which mayadvantageously be channel bars arranged with vtheir backs outward andend elements 2, 2, which may also be channel bars similarly arranged.The side and end portions of the frame are preferably connected bysuitable corner brackets 3, 8. One of these b ackets is shown in sectionin Fig. 9. i f

it the rear of the traction carriage and engaging the transverse axle elare two large ground engaging supporting and Vdriving wheels 5, 5. Along tube or sleeve 6 is provided which incloses the axle throughout thegreater part of lits length between the two wheels 5, 5. The tube 6 isprovidedv at suitable points with horizontal bosses or shelves 7 upon.which rest the rear ends of the side members 1, l, of the main carriageframe. Plates 8 are preferably interposed between the shelves 7 and theframe meinbers 1.

9 is a transyerse rotatable shaft `posi-V tioned short distance inadvance of the axle.. This shaft is mounted in a bearing tube or sleeve10 whichv is similar to the tube 6 for the axle. i The tube 10 isprovided with bosses or shelves 11 adapted to engage l Y the frame sidemembers 1, 1, 'suitable plates Below the main frame of the carriagethere is provided sub-frame which is Vformed in part oftii'iolongitudinal metallic straps 15, l5, each'of which is bent upward at itsforward Vendy and secured tothe corre- `spending mam frame lside'element lat 16.-

Behind each pointfof attachment at 16 there is'provided la verticalstrut' 17b'etween the side element- 1 andthe strap 15. Each strap 15engages the bottoms of the bosses 14,14, at-the corresponding ends ofthebearing tubes G and 10. Y The strapsare held in engagement with thebosses and the tubes are secured to the main framev by means of boltsV18 and 19, `which extend.

through suitable vertical apertures in the'V bottom flanges of the frameside elements, in the sleeves and their bosses, and in the straps. Theholes in the bottomrflanges of the frame elementsand in the straps are'large enough. to permit 'adjustment of the sleeves within inarrowlimits. The .two

strapsI, l5, are connected attheir rear cnds'by means of a transverseAbar 20 which is preferably angle shaped.. Y

21 is a platform for theoperator mounted. upon the 'subframel)'rtferab'lyV a resili. ent connection is provided forV this platform.As shown in the `drawings the fo'rl ward end of the platform isYpivotally4 connectedfto the sub-frame by-means of lhinges at 22. Therear end of theplatform is sup ported uponthe-crossbar 2O by means vofinterposed coilsprings 23.. Atthe side of the platform there arepreferably guards or covers 23a, 23e, for the driveV wheels 5, 5.

The draft `connection for the 1 tractor comprises a horizontal draft bar24 which is piif'otally'connected at its forward end to a horizontaltransverse plate 25, which Vis Vpreferably provided with a number Vofpivot apertures so thatthe line of draft can'b'e adjustedtransversely-The transverse plate 25 is connected'with the subframe by means of asuitableV truss construction which is Vpreiferably made up of sidestraps l26 each secured at its kends toV thecorres'ponding sub-framestrap 15. The

straps 2o are 'at their Vcenters spaced from the straps 15 and; arerheld separatedthere- 4 from. by means of suitablestruts, V27,

A suitable transversely extending guide or' support 28 is provided forholding the rear Vend ofy the draft bar 24. This support permits thedraft bar to be swung to one side or A,the other.

The attachment ofthe draft .bar Vat a point immediately adjacent themain rear axle prevents the load that is being hauled from opposing' thesteering of the machine.

lf the draft bar were, connected in the-.rear

Vof theaXle the force transmitted through it would oppose the swingingmovement of Y the'tractor inresponse to an adjustment ofI the' :steeringwheels. j

At its forward end Vthe main carriage frame is supportedon the groundwheels 29, 29, and the axle 30.` The `axleV 30 is piif'otally connectedVwith the frame by means `of .a suitable bolster 31.' y and bolster are`bracedA and held against longitudinal movement withV respect to theframe4 by vine'ar'i's of a diagonal bar or brace 32. At the forward.'endl of the brace 32" Y there is an 'eye 33 which can be used. when. Y

the engine is moving rearward for the at- The axle I tachment of avehicle or otherobject to' be` hauled.

y 34 is atiansverse steeringV shaftV rotatable- 1n .suitable bearings'on the main carriagel frame. This shaftY 'carries 'at one end. a wormwheel 35 whichmeshes with al worm onallyl upward land backward andcarries at its rear upper end a steering wheel 38.

39 and 40 are two chains each connected at its forward endv to the axleB'O'near oneV `36 on a steering rod 37 which extends diag-f7 lolo end.and eachy connected attherear end-:to

the transverse i steeringi shaft 34 to bev wound thereon. Thechainsrar'e soconnect-f ed to the shaft that as thershaft 1s rotated?one off the. .Chains will be woundl upon it,and 5` the otherl of themwill be unwound from it.

lnv'this way, by turning thehandwheel 38 and'ther'by rotating the shaft34, the op erator can cause the' axle 30 together with the wheels 29,'29, to be swung. in one direction or the 'other for steering. v f

S'uitably secured to ieacli yof the drive wheels 5 is a `large bullwheel 41. At each end of the transverse shaft@ is a pinion 42 whichmeshes with the corresponding bull wheel l41.

43 is a large drive wheel mounted. for ro tation on the shaft V9.Suitable differential ygearimg' is interposed between the gear wheel 43and the'two pinions 42, 42. Thedifferential gearing can be arrangedfinany.y

desired way'A but I prefer-.to provide a case 44 within which Vcan-be`mounted'diffe-ren tial driving pinion's VI'r'ieshing with; lsuitablegears secured 'respectively lto theV right lhand pinionV 42 and to theshaft` 9.- The rightAVY` `Y hand pinion 42 isl rotatable with respect tothe shaft 9 and the left `hand pinion 42 isy I y Y iso. *Y

keyed lto it.V In this way power can: be

transmitted from the gear 'wheel 43 differthem to the drive wheels 5, 5.

The sliclable power plant frame comprises two mainV side elements 47,47, which are tied together by suitable cross members and by the partssuch as the motor and radiator frames which are mounted upon them. Eachof the side elements 47 preferably comprises an angle bar arranged withits vertical leg extending downward at the inner side. The elements 47,47, are so spaced that the horizontal leg of each of them can engage andrest upon the top of the hori- Zontal flange of the correspondingelement l of the main carriage frame, as shown in Fig. 5. The engagementbetween. these frame elements is a slidable one and the elements 47, 47canbe moved longitudinally with respect to the elements l, l, by devicesto be described. 1n order that the elements 47, 47, and l, l, may beheld in properv relationship, l prefer to provide on each shaft 47, twoor more brackets or guides 48, within each of whichthere is mounted forsuitable movement a block 49 adapted to engage at its upper end with theunder side of the top flange of the corresponding element l. A screw .50is provided ineach bracket 48 for adjusting the block 49 to hold it inproper relationship with the flange of the element l. These blocks 49,49,serve to prevent any vertical movement of -the power plant frame awayfrom the main carriage frame.

51 represents as a whole the internal combustion motor or engine bymeans of which power is supplied to drive the tractor engine or forother purposes. A motor of any suitable type may be used, but in thedrawings I have shown a motor provided with two horizontal oppositelydisposed cylinders. Themotor is suitably supported upon the frameelements 47, 47, and is arranged with its crank shaft 52 extendingtransversely. At one end of the shaft 52 there is provided a fly wheel i54 represents a governor for the engine which may be of any usual orpreferred type. engineV are provided erator at 55.

56 is a fuel tank mounted upon the slidable power plant frame preferablyat the rear end and is provided with suitable connections with themotor. At the forward end of the slidable power plant frame there isprovided a radiator 57 through which cooling water from the cylindersrof the motor can be led. This radiator can be of any usual or preferredconstruction and need'notbe here described in detail. The heated waterfrom the engine cylinders is led to the radiator preferably through thepipe 58, and after passing through the radiator and being cooled is ledthrough the within reach of the op- Suitable controlling means for thepipe 59 back to the cylinders. I do not however claim this specific formof radiator as Y a part of .my` present invention and if desired anotherform may be used. At the top of the radiator there-may be provided achimney GOinto which the exhaust gases from the cylinders can bedischarged through a pipe 6i.

As clearly shown in Figs. 3 and 4, a pinion 62 and a belt wheel 63 arerotatably mounted on the end of the motor shaft 52 opposite to that uponwhich is located the fly wheel 53. The pinion and the belt wheelk areconnected with each other but not with thev shaft by means of a key G4.The'posi tion of the pinion 62 on the. shaft is suoli that it can meshwith the drive gear 43 when the power plant is in properV position.

A clutch is provided for connecting the belt wheel G3 and the pinion 62with the motor shaft 52. This clutch may be of any one of a number oftypes but in the drawings I have shown a clutch which considerespecially well adapted for this purpose.

65 is a sleeve keyed to the outer end of the shaft 52 and held in placeby a collar 66. This sleeve G5 is provided with a number (preferablythree) of arms which are positioned at points within the rim of thewheel 63. Pivotally connected to each of the arms 67 is a lever 68 whichcarries at one'end a weight 69 and at its other end a shoe 70 adapted tofrictionally engage the inner surface of the rim of the wheel 63. Theshoe 70 may be constructed of wood or othersuitable material. Slidablymounted upon the sleeve -i's a second sleeve 7l which is-providednearits outer end with an an# nular flange or rib 72. n

73 is a collar formed in two parts and adapted to fit over and engagethe flange 72 on the sleeve 7l. Between the shoe end of each of thelevers 67 and the sleeve 7l there v is provided astrut or thrustconnection 74r` connection with the sleeve 7l. Each strut is preferablymade up of two parts which are threadedtogether an'drso arranged that byturning one of them with respect to the other the length of the strutcan be adjusted. The arrangement is such that when the sleeve 7l is inits innermost position, as shown in Fig. 3, the shoes 70 will be held infirm engagement with the inner surface of the wheel. When the sleeve islin its outer position the levers 68 will be swung and the shoes 7 0withdrawn from engagement with the wheel. The lengths of the struts 74can be adjusted from time to time in the manner described to compensatefor wear on the shoes 70.

75 is a horizontal braclretadjacent the ation by a slight movement of.the lever-82.'

Mounted for movement about a vertical Ypivot at the outer end of theVbracket l75 is a bell crank havingV one arm 76 forked and provided withapertures to receive oppositel y disposed trunnions 77 zon the .collar73. The other arm 78 of the bell crank extends inward and has pivotallyconnected to its inner end a link 79 which extends rearward and ispivotally connected to an arm 8O on a transverse rock shaft 81.

82 is an operatingY lever secured to the rock shaft 81 and positionedwithin reach of the operator. With the parts in the position showninFigs. 3 and 4, the clutch is operative and the belt wheel 63 and thepinion 62 are connected with the engine shaft 52. Inasmuch as each strut74 lis parallel to the line of force reaction between the correspondingshoe and the rim of the wheel there is no tendency for'the' clutch to bethrown out of operation. The clutch can however be very'easily thrownout of oper- By moving this lever the sleeve 71 can be movedlongitudinally and a 'corresponding'. inward movement of the shoes willtakel place. The counter weights 69 on the levers 68 serve to offset thetendency of the shoes to move outward under theinfluence of centrifugalforce.

Mounted upon the arm 78 of the bell crank is a brake shoe 83 which isformed toengage the outer surface of the belt wheel 63. This brake shoeis so arranged that.` it will be automatically brought into engagementwith the wheel whenever the-parts are moved to disengage the clutch.This brake shoe serves to very quickly stop the rotation of the beltwheel and of the pinion 62.-

As has been before stated the whole power plant together with itssupporting frame can be bodily moved longitudinally of the maincarriageframe. The means which T haveprovided for eifecting thislongitudi" nal movement of the power plant comprises a Vhand lever 84which is pivotally mounted vnear its lower enden the rear cross piece 2'of themain carriage frame. This lever is within easy reach of theoperator. Pivotally connected with. the lever 8,4 at its end below thepoint of pivotal mounting onvthe frame, are two connecting rods 85,785,which are separatedV at their forward ends and suitably connected to. across member 86 which extends betweenl the two side elements 47, 47, ofthe power plant frame. AdjacentV Y the lever 84 isa segment 87 providedwith Y when the power plant -is in its rear positionV two ynotcheseither of which can be engaged by a manually controlled latch on thelever to lock' thevlever in place withl the power plant frame either inits forward or in its rear position. The arrangement is such that thepinion 62 on the motor shaft will mesh with the main drive wheel 43 asindicated in Fig. 6. Whenthe power vplant is in its for- Y ward positionthe pinion will be out of mesh with the gear as indicated in Figs. 7 and8. ln order that the longitudinal movement ofthe power plant framemay beaccurately limited I provide on the main framescrews 88, 88, which areso positioned that Veach will engage one end lor the other of one of`For instance it is possible to so adjust the screws that when the frameis moved `rear-A ward it will be stopped `with the pinion 62 accuratelyin mesh with the drive :gear 43.1

89 is a reversing pinion which can. .be

moved to mesh with-the drive wheel 43 and the pinion 62 to transmitpower from` the;y

pinion to thegear in thereverse direction when the .pinion and gear areseparated as indicated in Fig.- 8. Preferably the pinion`V 89 is mountedupon a bracket 90 secured-l to the sideelement 1 4of the ymain carriageframe. Preferablyas indicated in F igs. 8 and 10 the plate 90 has slots91 for receiving studs 92 on lthe frame element. Asindicatedin Fig. 8,the slots are substantially parallel with the pitch circle of theL gear43 atthe point oit engagement with the gear 89. It is therefore possibleto adjust the:V gear 89 vbodily y along Vlines paralleli to theperiphery of the drive gear 43.k The bracket and the gear Acan be lockedin adjusted position by means of nutsl on thestuds 92. The

bracket -is provided with a stub shaft 93 upon which therel is rotatablyVmountedian i Veccentric 94 which is :shown in detailV in Fig. 12.The-gear89-has a'bearing onV the l periphery of theeccentric `94 andthe, gear 1s held in'` place bymea-n'sof'a cap 95 secured by a bolt 96.The'eccentric, the gear` and the cap 95 are all lheld in place on the vshaft93 yby means-of a second cap 97,

cured. by a bolt 98. The eccentric 943is provided at one side with asegmentr- 99 Y which is concentric with the aperture for the` shaft 93.Pivotally connected. to one end 'of` this segment `99 is arod 100 whichextends` rearward and is connected to a hand lever 101 which ispivotally connected at its lower end with the main carriage frame."Thislever 101 is within convenient reachY of theY operator. When theparts are inl the` posi-" Y *V ing the lever 101, can move theeccentric94- 1 tion shown in .Fig 7 the operator by mov-` and with it the gear89'about ythe shaft 93;:

This movement brings the gear 89 simultaneously into mesh with the gear43v and the pinion 62 as shown in. Fig. V8. Power can Vthen .betransmitted; lfrom the pinion 'i through the gear89 to `drivethe gear 43the direction opposite to that in which it is driven when directlyengagedV by the pinion.

In order to limit the rnovementof the eccentric and the gear about theshaft 93 I provide a lug 102 on the bracket 90 and in a threadedaperture in this lug there is a screw 103 adapted to engage the end ofthe segment 99. By adjusting the screw the eX- tent of movement of theeccentric can be controlled as desired.

In order that the gear 89 may not be moved into engaging position whenthe pinion 62 is not out of mesh with the gear 43 and in order toprevent rearward movement of the power plant when the gear 89 is inoperative position,I provide a stop 104 which may conveniently bemounted upon the bracket 7 5 before referred to. This stop is sopositioned that it will engage the segment 99 when the eccentric is notin the eXtreme position shown in Figs. 6 and 7 and positively lock thepower plant frame against rearward movement. The stop 104 also serves toprevent movement of the eccentric when the power plant frame is in itsrear position as shown in Fig. 6. It will be seen that this stop servesto positively prevent the gears being all engaged at the same time andthereby injured. l

In operation the motor 51 can be rst started by manually turning the flywheel 53,*it being of course understood that the clutch is disengaged.It being assumed that the power plant is in its rear position asindicated in Fig. 6, the tractor can be started in the forward directionby simply moving the lever S2 to engage the clutch. When it is desiredto reverse the tractor and run it in the other direction, the operatorfirst moves the lever S2 to disengage the clutch and si multaneouslyapply the brake 83 to stop rotation of the pinion 62. Then by means ofthe lever 811 he moves the power plant forward to bring the pinion 62into the position indicated in Fig. 7. Then by means of the lever 101the gear 89 is moved into mesh with the pinion 62 and the gear 43. Theclutch can then be thrown into engagement and the tractor started in therearward direction.

When the tractor is to be used for driving a thresher or other machineit can be driven by its own power into proper position to bring the beltwheel 63 into alinement with the belt wheel of the machine to be driven.It will of course be understood that the belt will extend forward andwill not therefore be interfered with by the brake 83. Preferably thetractor' is placed initially near enough to the machine to permit thebelt to be easily put on the pulleys. Then with the reversing gear S9 inthe operative position, as shown in Fig. S, the operator can, bycarefully throwing the clutch, move the tractor slowly backward farenough to properly tension the belt. After the belt is properlytensioned the clutch can be thrown out and the reversing gear can bemoved to the posis tion shown in Fig. 7. Then the clutch can be thrownin and the tractor is ready to supply power Yto the thresher or othermachine which is to be driven.

It will be noted that I have provided a tractor which has a singleclutch through which power can be transmitted either to drive thetractor bodily over the ground or to transmit power through a belt to anindependent mechanism. One of the features which make possible thecontrol of the trac'- tor by means of a single clutch is the rigidconnection between the belt wheel and the driving pinion for freerotation on the engine shaft. Another very advantageous feature is theprovision in combination with the single clutch for the belt wheel andpinion of the slidable power plant for making and breaking the powerconnection to the ground wheels. gas tractors, Serial Number 606,719,filed February 6, 1911, I have shown a motor slidably mounted upon themain frame of a tractor and I do not therefore claim this subject-matterbroadly as a part of my present invention. I do however believe that bymy present invention I am the first to provide an entire. power plantincluding the fuel supply tank, the radiator and all auxiliarymechanisms mounted for slidable movement as a unit. In fact, if desired,the entire power plant can be detached from the carriage frame withoutthe disturbance of any of its parts.

What I claim is 1. The combination with the main fra-me, the drivingwheels, Athe steering wheels, and the toothed gearing mounted on themain frame and permanently connected to the drive wheels, of thesupplemental frame ,L

slidably mounted on the main frame, a toothed prime power pinion mountedon, and bodily movable with, the sliding frame and adapted to mesh withsaid toothed gearing, a complete power plant on the slidable framecomprising an internal combustion engine, an engine shaft, a liquid fueltank, a cooling water-jacket system for the engine, a water-coolingradiator, ducts connecting the radiator and the engine water-jacketsystem and having all of theirparts permanently iiXed in rigid relationto the engine and the radiator, said engine shaft being normally loosein relation to said prime pinion, manual means for connecting the shaftto said pinion, and manual means for moving the said power plant as anentirety with the radiator, and radiator ducts, while held in said fixedrelationship, to bring said pinion into and out of operative relationwith said toothed gearing on the main frame.

2. In a tractor, the combination with a main frame and Vdriving andsteering wheels therefor, of an engine mounted on the frame, a drivepinion and a belt pulley rigidly c011- Ink my co-pending application fornected together for rotation independently of the shaft of the engine, asingle manually controllable clutch for connecting the pinion and thepulley simultaneouslyy to the shaft of the engine, gearing fortransmitting power from the said drive pinion to the main drive wheelsof the tractor and means for breaking the power connection between thepinion and the-drive wheels.

3. In a tractor, the combination with a main lrame and driving wheelsand steering wheels therefor, of an internal combustion engine mountedon the frame, a drive pinion and a belt pulley rigidly connectedtogether for rotation independently of the shaft or' the engine, meansindependent of the pinion and pulley whereby the engine may be turnedfor starting, a single manually controllable clutch for connecting thepinion and the pulley simultaneously to the shaft oit the engine,gearing for transmitting power from the said drive pinion tothe maindrive wheels of the tractor and means for breaking` the power connectionbetween the pinion Aand the drive wheels.

4. In atractor, the combination with a main frame and driving andsteering wheels therefor, of an engine mounted on the frame., a drivepinion and a belt pulley connected for rota-tion independently of theshaft of the engine, a single 4manually controllable clutch forconnecting the pinion and the pulley simultaneously to the shaft of theengine, a brake for the pulley and pinion,-

gearing for transmitting power from the said drive pinion to the maindrive wheels of the tractor, and means for breaking the power connectionbetween the pinion and the drive wheels.

5. In -a tractor,I the combination with a main frame and driving andsteering wheels therefor, of an engine mounted on theframe, a drivepinion and abelt pulley connected for rotation independently of theshaft of the engine, a single manually controllable clutch forconnecting the pinion and the pulley simultaneously'to the shaft of theengine, a brake for the pulley and pinion connected with Vthe clutch tobe automatically applied when the clutch is released, gearing fortransmitting power from the said drive pinion'to the main drive wheelsoi the tractor, andmeans for breaking the power connection between thepinion and the drive wheels.

6.7In a tractor, the combination with -a mainframe and driving andsteering wheels therefor, of an internal combustion enginel mounted onthe frame, a drive pinion and a belt pulley connected for rotationindependently of the shaft of the engine, means independent of thepinion and pulley whereby the engine may be turned for starting, asingle manually controllable clutch for connecting the pinion and thepulley simultaneously tothe shaft of the engine, a brake -for the'lpulley and pinion, gearing for transmitting.

power from the said drive pinion to the mainV drive wheels of thetractor, and means `for breaking the power connection` between 'thepinion and the drive wheels.

7. In a tractor, the combination with a e main frame and driving' andsteering wheels therefor, or. an engine mounted on the frame, e

a drive pinion and a belt pulley rigidly connectedv'together forrotation independently oiu the shait of the engine, a single manuallycontrollable clutch for connecting the pinion;

and the pulley simultaneously to the shaft of the engine, gearing fortransmitting power from the said drive pinionto the main drive wheels ofthe tractor,means for breaking the power connection between the pinionand the drive wheels, and means for changing the power connectionbetween the pinion and the drive wheels to cause the drive wheels to bedriven in the reversedirection.

8. In a tractor, the combination with a` main frame and driving andsteering wheels 'v therefor, of an internal combustion engine mounted onthe frame, a drive pimon and a belt pulleyl rigidly connected togetherlfor I rotation independently of the shaft of the engine, meansindependent of the pinionand pulley wherebythe engine may be turned forstarting, a single .manually controllablel clutch for connecting. thepinion and the pulley simultaneously to they shaft of the engine,gearing for transmitting power from the said drive pinionf to the maindrive wheelsA of the tractor, means for breaking for rotationindependently: of the sha-itt" ofV the engine, a single manuallycontrollable.

clutch for connecting the pinion and the pulley simultaneously Vto theshaft of the en gine, a brake for the pulley and pinion connected withthe clutch to be automatically applied when the clutchis released,gearing for transmitting power from the said drivel pinion to the maindrive wheels of the tractor, means for breaking the power connec tionbetween the pinion and the drive wheels, and means for changing thepower connection between the pinion and the drive wheels to cause thedrive wheels to be drivenin the reverse direction.

10. In a tractor, the-combination with a main frame and drivingV andsteering wheels therefor, of an internal combustion engine.

mounted on the frame, a drive pinion and Va belt pulley connected forrotation independios ently of the shaft of the engine, means independentof the pinion and pulley whereby the engine may be turned for starting,a single manually controllable clutch for connecting the pinion and thepulley simultaneously to the shaft of the engine, a brake for the pulleyand pinion connected with the clutch to be automatically applied whenthe clutch is released, gearing for transmitting power from the saiddrive pinion to the main drive wheels of the tractor, means for breakingthe power connection between the pinion and the drive wheels, and meansfor changing the power connection between the pinion and the drivewheels to cause the drive wheels to be driven in the reverse di rection.

11. In a tractor, the combination with a main frame and driving andsteering wheels therefor, of an engine mounted on the frame, a drivepinion and a belt pulley connected for rotation independently of theshaft of the engine, a single manually controllable clutch forconnecting the pinion and the pulley simultaneously to the shaft of theengine, means for moving the engine and the pinion relatively to themain frame, and a gear on the main frame connected with the drive wheelsand positioned to be engaged by the said drive pinion when the pinion isin one position and to be disengaged from the pinion when the pinion isin another position.

12. In a tractor, the combination with a main frame and driving andsteering wheels therefor, of an internal combustio-n 'engine mounted onthe frame, a drive pinion and a belt pulley connected'for rotationindependently of the shaft of the engine, means independent of thepinion and pulley whereby the engine may be turned for starting, asingle manually controllable clutch for connecting the pinion and thepulley simultaneously to the shaft of the engine, means for moving theengine and the pinionfrelatively to the main frame, and a gear on themain frame connected with the drive wheels and positioned to be engagedby the said drive pinion when the pinion is in one position and to bedisengaged from the pinion when the pinion is in another position.

13. In a tractor, the combination with a main frame and driving andsteering wheels therefor, of an engine mountedon the frame, a drivepinion and a belt pulley connected for rotation independently of theshaft of the engine, a single manually controllable clutch forconnecting the pinion and the pulley simultaneously to the shaft of theengine, a brake for the pulley and pinion connected with the clutch tobe automatically applied when the clutch is released, means for movingthe engine and the pinion relatively to the main frame, and a gear onthe main frame connected with the drive indel'iendent of the pinion andpulley wherc- K by the engine may be turned for starting, a singlemanually controllable clutch for connecting the pinion and the pulleysimultaneously to the shaft of the engine, a brake for the pulley andpinion connected with the clutch to be automatically applied when theclutch is released, means for moving the engine and the pinionrelatively to the main frame, and gear on the main frame connected withthe drive wheels and positioned to be engaged by the said drive pinionwhen the pinion is in one position and to be disengaged from the pinionwhen the pinion is in another position.

15. In a tractor, the combination with a main frame and driving andsteering wheels therefor, of an engine mounted on the frame, a drivepinion and a belt pulley connected for rotation independently of theshaft of the engine, a single manually controllable clutch forconnecting the pinion and the pulley simultaneously tothe shaft of theengine, means for moving the engine and the pinion relatively to themain frame, a gear on the main frame connected with the drive wheels andpositioned to be engaged by the said drive pinion when the pinion is inone position and to be disengaged from the pinion when the pinion is inanother position, an idler pinion movably mounted on the main frame, andmeans for moving the said idler pinion to bring it into engagement withthe said drive pinion andthe sai d` gear when the drive pinion is out ofdirect engagement with the gear.

16. In a tractor, the combination with a main frame and driving andsteering wheels therefor, of an internal combustion engine mounted onthe frame, a drive pinion and a belt pulley connected for rotationindependently of the shaft of the engine, means independent of thepinion and pulley whereby the engine may be turn-ed for starting, asingle manually controllable clutch for connecting the pinion and thepulley simultaneously to the shaft of the engine, means for moving theengine and the pinion relatively to the main frame, a gear on the mainframe connected with the drive wheels and positioned `to be engaged bythe said drive pinion when the pinion is in one position and to bedisengaged from the pinion when the pinion is in another position, anidler pinion inovably` mounted on the main frame, and meanstor movingthe said idler' pinion to bring it into engagement with the said drivepinion and the said gear 1vlien the drive pinion is out of directengagement with the gear.

17. In a tractor` the combination With a main traine and driving andsteering Wheels therefor, of an'engine mounted on the frame, a drivepinion and a belt pulley connected for rotation independently of theshaft ot the engine, a. single manually controllable clutch forconnecting the pinion and the pulley simultaneously to the shaft of theengine, a brake for the pulley and pinion connected with the clutch tobe automatically applied when the clutch is released, means for movingthe engine and the pinion rela.- tively to the main frame, a gear on themain frame connected with the drive Wheels and positioned to be engagedby the said drive pinion Vwhen the pinion is in one position and to bedisengaged from. the pinion When the pinion. is in another position, anidler pinion. movably mounted on the mainframe, and means for moving thesaid idler pinion to bring it into engagementJ with the said drivepinion and the said gear When the drive pinion is out of directengagement with the gear.

18. In a tractor, the combination Witha main frame and driving andsteering Wheels therefor, of an internal combustion engine mounted onthe trame, a drive pinion and a belt pulley connected for rotationindependently of the shaft of the engine, means independent ot thepinion and pulleyvvvhereby the engine may be turned for starting, asingle manually controllable clutch for connecting the pinion and thepulley simultane-V ously to the shaft of the engine, a brake for thepulley and pinion connected With the clutch to be automatically appliedwhen the clutch is i'eleased,'nieans for moving the en- `gine and thepinion relativel.lv to the main frame, a gear on the main frameconnected with the drive Wheels and positioned to be pinion is in oneposition and to be disengaged Jfrom the pinion Vwhen the pinion is inanother position, an'idler pinion movably mounted on the main frame, andmeans for moving the said idler pinion to bring it into engagement iviththe said drive pinion and.'

the said gear when the'drive pinion is out' of direct engagement Withthe gear.

19. In a. tractor, the combination With a main Jframe Vand driving` andsteering Wheels therefor, of an engine mounted on the frame, meansiorrmoving the engine with respect to the main frame, a drive pinionconnected with the engine andl bodily movable therewith, a gear on themainl frame connected With the drive Wheels and positioned-to be engagedby the said drive engaged by the said drive pinion When the pinion whenit is in one position and to be disengaged by the said drive pinion Whenit is in another position,y a rotatableidler pinion movably mounted onthermain frame,

and means independent of the meansrfor moving the engine for moving theidler pinion tobring it into .engagement with the drive pinion and thegear when the drive pinion is out of direct engagement with the gear.

20. In a tractor, the combination with a main frame and driving andsteering Wheels therefor, ofan engine mounted on the frame, a drivepinion and .a belt pulley lconnected for rotation independently .of the.

shaft of theengine, a single manually controllable clutch for connectingthe pinion and the pulley simultaneously to the shaft of the engine,means for moving the engine and the pinion relatively to the main frame,

a gear on the main frame connected with the drive Wheels Vand positionedto be engaged by the said drive pinion When itis tation independently ofthe shaft of theengine, a manuallycontrollable clutch foi" connectingthe pinionl tothe shaft foffthe engine, means for moving the engine andVthe pinion, relatively to. the 'main traine',` a.

gear on the mainframe connected with the driving and steeringV driveWheelsand positioned to be engaged by the said drive `pinion When itisin one position and to be disengaged from the Ypinion when it is inanother position, an idler pinion, a bearing forthe pinion having aneccentric pivotal connection With the `main frame, and means for rockingthebearingf about its pivot to bring the idler pinion into engagementwith the drive pinion vandthe gear when thepinionis .out of dieet:

engagement with the gear.

' 22. In a tractor, the combination with a main frame and driving andsteering Wheels therefor, cfa-n' engine mounted ron the frame, a drivepinion mounted for rotation independently of the shai't of the engine,a-manually controllable clutchfor connecting the pinion to the shaft ofthe engine, means for moving the engineand the pinion relatively to the.main frame, a gea-r on the main frame connected `with the drive Wheelsand ypositioned to be engaged by thesaid .drive pinion When itis havingan eccentric pivotal connection with the main frame, means for rockingthe bearing about its pivot to bring the idler pinion into engagementwith the drive pinion and the gear when the pinion is out of directengagement with the gear, and adjustable mea-ns for limiting theArocking movement of the bearing to prevent the movement of the idlerpinion beyond proper meshing position.

Q3. In a tractor, the combination with a main .frame and driving andsteering wheels therefor, of an engine mounted on the frame, a drivepinion mounted for ro- .tation independently7 of the shaft of theengine, a manually controllable clutch for connecting the pinion to theshaft of the engine, means for moving the engine and' the pinionrelatively to the main frame, a gear on the main frame connected withthe drive wheels and positioned to be engaged by the said drive pinionwhen it is in one position and to be disengaged from the pinion when itis in another position, an idler pinion movably mounted on the mainframe, means for moving the said idler pinion to bring it intoengagement with the said-drive pinion and the said gear when the pinion'is out of direct engagement with the gear, and means for positivelylocking the engine and pinion against movement relatively to the mainframe when the idler pinion is in mesh with the drive pinion and thegear.

24. In a tractor, the combination with a main frame and driving andsteering wheels therefor, of an engine mounted on the frame, a drivepinion mounted for rotation independently of the shaft of the engine, amanually controllable clutch for connecting the pinion to the shaft ofthe engine, means for moving the engine and the pinion relatively to themain frame, a gear on the main frame connected with the drive wheels andpositioned to be engaged by the said drive pinion when it is in oneposition and to be disengaged from the pinion when it is in anotherposition, an idler pinion movably mounted on the main frame, means formoving the said idler pinion to bring it into engagement with the saiddrive pinion and the said gear When the pinion is out of directengagement with the gear, and means for positively` locking the idlerpinion against movement into operative position when the drive pinion isin direct engagement with the gear.

25. In a tractor, the combination with a main frame, and driving andsteering wheels therefor, of an engine mounted on the frame, a drivepinion mounted forrotation independently of the shaft of the engine, amanually controllable clutch for connecting the pinion to the shaft ofthe engine and the pinion, means for moving the engine with respect tothe main frame, a gear on the main frame connected with the drive wheelsand positioned to be engaged by the said drive pinion when it is in oneposition and to be disengaged from the pinion when it is in anotherposition, an idler pinion movably mounted on the main frame, means formoving the said idler pinion to rbring it into engagement with the saiddrive pinion and the said gear when the pinion is out of directengagement with the gear, means for positively locking the engine andpinion against movement when the idler pinion is in en- Vgagement withthe drive pinionland the gear, and means for positively locking theidler pinion against movement into operative position when the drivepinion is in engagement with the gear.

26. In a tractor, the combination with a main frame and driving andsteering wheels therefor, of an engine mounted on the frame, a drivepinion mounted for rotation independently of the shaft of the engine, amanually controllable clutch for connecting the pinion to the shaft ofthe engine, means for moving the engine and the pinion relatively to themain-frame, a gear on the main frame connected with the drive wheels andpositioned to be engaged by the said drive pinion when it is inl oneposition and to be disengaged from the pinion when it is in anothervposition, an idler pinion, a bearing for the pinion having an eccentricpivotal connecl tion with the main frame, means for rocking the bearingabout its pivot to bring the idler pinion into engagement with the drivepinion and the gear when the pinion is out of direct engagement with thegear, a projection on the bearing for locking the frame against movementwhen the bearing is in position to hold the idler pinion in engagementwith the drive pinion and the gear, and means on the frame arranged toengage the said projection on the bearing to hold the bearing againstmovement when the frame is positioned to hold the drive pinion inengagement with the gear.

27. In a tractor, the combination with a main frame andv driving andsteering wheels therefor, of a power plant frame mounted on the mainframe and slidable longitudinally with respect thereto, manuallycontrollable means for sliding the power plant frame, an engine mountedon the slidable power plant frame for movement therewith, a drive pinionmounted onA the power plant frame for movement therewith, the saidpinion being rotatable independently of the engine shaft, a manuallycontrollable clutch for operatively vconnecting the drive pinion withthe engine shaft, a gear on the main frame connected with the drivewheels and adapted to be engaged by the said drive frame mounted thereonand comprising at` its side two channel bars, of a power plant framecomprising two side bars each having a horizontal flange resting uponthe horizontal flange of the corresponding side bar of the main frameand a vertical leg posi# tioned oppositely-to the vertical element ofthe corresponding bar of the main frame, adjustable means on each sidebar of the power plant frame for engaging the under side of thehorizontal ange of the corresponding bar of thevniain frame to hold thepower plant frame against movement upwardfaway from the main frame,means for moving the power plant frame longitudinally with respect tothe main frame, an engine mounted on the power plant frame, a. drivepinion connected with the motor, andi a gear on `the main frameconnected with the drive wheels and arranged to be engaged by the drivepinion when the power plant traine is in oneposi-tion and to be disen-lgaged by the pinion. when the power plant iframe is in another position.

In testimony whereof I affix my signature, in presence of two witnesses.

ALBERT O. ESPE.

Witnesses v J. E. PAGE, M. E. VALKER.

Copies of this, patent may be `obtained for tive cents each,Y byaddressing the Commissioner of Patenti, Washington, D. G.

